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author | patacongo <patacongo@7fd9a85b-ad96-42d3-883c-3090e2eb8679> | 2012-02-01 19:07:57 +0000 |
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committer | patacongo <patacongo@7fd9a85b-ad96-42d3-883c-3090e2eb8679> | 2012-02-01 19:07:57 +0000 |
commit | 6a4e8b32b36f90188dd0a1a961c99b2bc825b627 (patch) | |
tree | 058c4031d3edf80d524112e76c6da2bdc0be8e5c /apps/system | |
parent | 47fa99c4a804956d537a3570587c59ecfb589717 (diff) | |
download | px4-firmware-6a4e8b32b36f90188dd0a1a961c99b2bc825b627.tar.gz px4-firmware-6a4e8b32b36f90188dd0a1a961c99b2bc825b627.tar.bz2 px4-firmware-6a4e8b32b36f90188dd0a1a961c99b2bc825b627.zip |
Move lib/stdio/lib_fgets.c to apps/system/readline; simplify fgets(); use readline instead of fgets in NSH
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4356 7fd9a85b-ad96-42d3-883c-3090e2eb8679
Diffstat (limited to 'apps/system')
-rw-r--r-- | apps/system/Makefile | 6 | ||||
-rw-r--r-- | apps/system/readline/Makefile | 99 | ||||
-rw-r--r-- | apps/system/readline/readline.c | 332 |
3 files changed, 434 insertions, 3 deletions
diff --git a/apps/system/Makefile b/apps/system/Makefile index 3697f4aa4..a0eb5dfde 100644 --- a/apps/system/Makefile +++ b/apps/system/Makefile @@ -1,8 +1,8 @@ ############################################################################ # apps/system/Makefile # -# Copyright (C) 2011 Gregory Nutt. All rights reserved. -# Author: Gregory Nutt <spudmonkey@racsa.co.cr> +# Copyright (C) 2011-2012 Gregory Nutt. All rights reserved. +# Author: Gregory Nutt <gnutt@nuttx.org> # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions @@ -37,7 +37,7 @@ # Sub-directories containing system task -SUBDIRS = free i2c install +SUBDIRS = free i2c install readline # Create the list of installed runtime modules (INSTALLED_DIRS) diff --git a/apps/system/readline/Makefile b/apps/system/readline/Makefile new file mode 100644 index 000000000..3d9503cea --- /dev/null +++ b/apps/system/readline/Makefile @@ -0,0 +1,99 @@ +############################################################################ +# apps/system/readline/Makefile +# +# Copyright (C) 2012 Gregory Nutt. All rights reserved. +# Author: Gregory Nutt <gnutt@nuttx.org> +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in +# the documentation and/or other materials provided with the +# distribution. +# 3. Neither the name NuttX nor the names of its contributors may be +# used to endorse or promote products derived from this software +# without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS +# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED +# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN +# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +# POSSIBILITY OF SUCH DAMAGE. +# +############################################################################ + +-include $(TOPDIR)/.config +-include $(TOPDIR)/Make.defs +include $(APPDIR)/Make.defs + +ifeq ($(WINTOOL),y) +INCDIROPT = -w +endif + +# The Readline Library + +ASRCS = +CSRCS = readline.c + +AOBJS = $(ASRCS:.S=$(OBJEXT)) +COBJS = $(CSRCS:.c=$(OBJEXT)) + +SRCS = $(ASRCS) $(CSRCS) +OBJS = $(AOBJS) $(COBJS) + +BIN = $(APPDIR)/libapps$(LIBEXT) + +ROOTDEPPATH = --dep-path . + +# Common build + +VPATH = + +all: .built +.PHONY: context depend clean distclean + +$(AOBJS): %$(OBJEXT): %.S + $(call ASSEMBLE, $<, $@) + +$(COBJS): %$(OBJEXT): %.c + $(call COMPILE, $<, $@) + +.built: $(OBJS) + @( for obj in $(OBJS) ; do \ + $(call ARCHIVE, $(BIN), $${obj}); \ + done ; ) + @touch .built + +# Context build phase target + +context: + +# Dependency build phase target + +.depend: Makefile $(SRCS) + @$(MKDEP) $(ROOTDEPPATH) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep + @touch $@ + +depend: .depend + +# Housekeeping targets + +clean: + @rm -f *.o *~ .*.swp .built + $(call CLEAN) + +distclean: clean + @rm -f .context Make.dep .depend + +-include Make.dep diff --git a/apps/system/readline/readline.c b/apps/system/readline/readline.c new file mode 100644 index 000000000..4cd29c16f --- /dev/null +++ b/apps/system/readline/readline.c @@ -0,0 +1,332 @@ +/**************************************************************************** + * lib/stdio/lib_fgets.c + * + * Copyright (C) 2007-2008, 2011-2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdbool.h> +#include <stdio.h> +#include <unistd.h> +#include <string.h> +#include <ctype.h> +#include <errno.h> +#include <debug.h> + +#include <apps/readline.h> + +/**************************************************************************** + * Definitions + ****************************************************************************/ +/* In some systems, the underlying serial logic may automatically echo + * characters back to the console. We will assume that that is not the case + & here + */ + +#define CONFIG_READLINE_ECHO 1 + +/* Some environments may return CR as end-of-line, others LF, and others + * both. The logic here assumes either but not both. + */ + +#undef CONFIG_EOL_IS_CR +#undef CONFIG_EOL_IS_LF +#undef CONFIG_EOL_IS_BOTH_CRLF +#define CONFIG_EOL_IS_EITHER_CRLF 1 + +/**************************************************************************** + * Private Type Declarations + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ +/* <esc>[K is the VT100 command erases to the end of the line. */ + +static const char g_erasetoeol[] = "\033[K"; + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: readline_rawgetc + ****************************************************************************/ + +static inline int readline_rawgetc(int infd) +{ + char buffer; + ssize_t nread; + + nread = read(infd, &buffer, 1); + if (nread < 1) + { + /* Return EOF if the end of file (0) or error (-1) occurs */ + + return EOF; + } + return (int)buffer; +} + +/**************************************************************************** + * Name: readline_consoleputc + ****************************************************************************/ + +#ifdef CONFIG_READLINE_ECHO +static inline void readline_consoleputc(int ch, int outfd) +{ + char buffer = ch; + (void)write(outfd, &buffer, 1); +} +#endif + +/**************************************************************************** + * Name: readline_consoleputs + ****************************************************************************/ + +#ifdef CONFIG_READLINE_ECHO +static inline void readline_consoleputs(FAR const char *str, int outfd) +{ + (void)write(outfd, str, strlen(str)); +} +#endif + +/**************************************************************************** + * Global Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: readline + * + * readline() reads in at most one less than 'buflen' characters from + * 'instream' and stores them into the buffer pointed to by 'buf'. + * Characters are echoed on 'outstream'. Reading stops after an EOF or a + * newline. If a newline is read, it is stored into the buffer. A null + * terminator is stored after the last character in the buffer. + * + * This version of realine assumes that we are reading and writing to + * a VT100 console. This will not work well if 'instream' or 'outstream' + * corresponds to a raw byte steam. + * + * This function is inspired by the GNU readline but is an entirely + * different creature. + * + * Input Parameters: + * buf - The user allocated buffer to be filled. + * buflen - the size of the buffer. + * instream - The stream to read characters from + * outstream - The stream to each characters to. + * + * Returned values: + * On success, the (positive) number of bytes transferred is returned. + * A length of zero would indicated an end of file condition. An failure, + * a negated errno value is returned. + * + **************************************************************************/ + +ssize_t readline(FAR char *buf, int buflen, FILE *instream, FILE *outstream) +{ + int infd; + int outfd; + int escape; + int nch; + + /* Sanity checks */ + + if (!instream || !outstream || !buf || buflen < 1) + { + return -EINVAL; + } + + if (buflen < 2) + { + *buf = '\0'; + return 0; + } + + /* Extract the file descriptions. This is cheating (and horribly non- + * standard) + */ + + infd = instream->fs_filedes; + outfd = outstream->fs_filedes; + + /* <esc>[K is the VT100 command that erases to the end of the line. */ + +#ifdef CONFIG_READLINE_ECHO + readline_consoleputs(g_erasetoeol, outfd); +#endif + + /* Read characters until we have a full line. On each the loop we must + * be assured that there are two free bytes in the line buffer: One for + * the next character and one for the null terminator. + */ + + escape = 0; + nch = 0; + + for(;;) + { + /* Get the next character */ + + int ch = readline_rawgetc(infd); + + /* Are we processing a VT100 escape sequence */ + + if (escape) + { + /* Yes, is it an <esc>[, 3 byte sequence */ + + if (ch != 0x5b || escape == 2) + { + /* We are finished with the escape sequence */ + + escape = 0; + ch = 'a'; + } + else + { + /* The next character is the end of a 3-byte sequence. + * NOTE: Some of the <esc>[ sequences are longer than + * 3-bytes, but I have not encountered any in normal use + * yet and, so, have not provided the decoding logic. + */ + + escape = 2; + } + } + + /* Check for backspace */ + + else if (ch == 0x08) + { + /* Eliminate that last character in the buffer. */ + + if (nch > 0) + { + nch--; + +#ifdef CONFIG_READLINE_ECHO + /* Echo the backspace character on the console */ + + readline_consoleputc(ch, outfd); + readline_consoleputs(g_erasetoeol, outfd); +#endif + } + } + + /* Check for the beginning of a VT100 escape sequence */ + + else if (ch == 0x1b) + { + /* The next character is escaped */ + + escape = 1; + } + + /* Check for end-of-line. This is tricky only in that some + * environments may return CR as end-of-line, others LF, and + * others both. + */ + +#if defined(CONFIG_EOL_IS_LF) || defined(CONFIG_EOL_IS_BOTH_CRLF) + else if (ch == '\n') +#elif defined(CONFIG_EOL_IS_CR) + else if (ch == '\r') +#elif CONFIG_EOL_IS_EITHER_CRLF + else if (ch == '\n' || ch == '\r') +#endif + { + /* The newline is stored in the buffer along with the null + * terminator. + */ + + buf[nch++] = '\n'; + buf[nch] = '\0'; + +#ifdef CONFIG_READLINE_ECHO + /* Echo the newline to the console */ + + readline_consoleputc('\n', outfd); +#endif + return nch; + } + + /* Check for end-of-file */ + + else if (ch == EOF) + { + /* Terminate the line (which might be zero length) */ + + buf[nch] = '\0'; + return nch; + } + + /* Otherwise, check if the character is printable and, if so, put the + * character in the line buffer + */ + + else if (isprint(ch)) + { + buf[nch++] = ch; + +#ifdef CONFIG_READLINE_ECHO + /* Echo the character to the console */ + + readline_consoleputc(ch, outfd); +#endif + /* Check if there is room for another character and the line's + * null terminator. If not then we have to end the line now. + */ + + if (nch + 1 >= buflen) + { + buf[nch] = '\0'; + return nch; + } + } + } +} + |